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Advances in Condensed Matter Physics
Volume 2012 (2012), Article ID 906598, 8 pages
http://dx.doi.org/10.1155/2012/906598
Research Article

Comparison of Constitutive Relationships for Dilute Granular Flow in a Vibrofluidized Cell

Department of Mechanical Engineering, Muhammad Ali Jinnah University, Islamabad, Pakistan

Received 22 February 2012; Revised 19 April 2012; Accepted 20 April 2012

Academic Editor: Nigel Wilding

Copyright © 2012 Nadeem Ahmed Sheikh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present comparison of two closure models for dissipative flow of granular gas. Initial validation of the models is achieved using MD simulations for a vibrated cell with elastic side walls. With the dissipation at the side walls, convective rolling in the cell is observed. We show that dense inelastic granular gas model exhibits deviations from near elastic model even at low dissipation and dilute conditions. The flow physics shows that the strength of convective roll can be related with the differential dissipations on the side walls. The discrepancy between the two models is significant as we reevaluate the scope of near elastic model in the presence of dissipative boundary conditions.